What do you consider rare post war

[MCoxon]

I may be duplicating a thread, but what do you consider rare population for a post war set, and what rare sets do you like for the combination of scarcity and card desirability?

I ask because I have a lot of base topps and bowman player runs but get really excited by the more oddball

For instance, 1954 Hank Aaron:
- 1954 Aaron Johnston cookies: 166 total in the PSA pop report
- 1954 Topps Hank Aaron: 3345

Or, Roberto Clemente:
- 1965 Macgregor Advisory Staff, PSA pop 17
- 1965 Topps, PSA pop 2400


What's your favorite scarcity / desirable issue? I personally love 1969 Nabisco Team Flakes (e.g., Pete Rose, population 56), 1959-1971 Bazookas, and 1971 Milk Duds.